Please help urgently!
I have been working on a project for many months, the site is live and working fine.
I booted up this morning and tried to add a Telerik control to a page in Visual Studio.
In design view, nothing happens, in source view, I get the dreaded 'Operation could
not be completed'.
I tried the advice already in the forums, but no solution so far. Work has come to a grinding
halt with Telerik controls.
As a test I then created a new web site using the RadControls template.
When I try to add controls to the default page, I get the same error, so it is not project
I guess this may be a vidual studio problem but can anyone tell me how to fix it?
This is not a new installation! Worked fine until today.
Setup is Windows vista ultimate, IIS7, Q2 2009 RadControls, VS 2008.
7 Answers, 1 is accepted
I know you mentioned you tried the advice on forums, however you didn't specify what you tried.
When I encountered this error a simple Toolbox reset did the trick.
Resetting the Visual Studio Toolbox can be done by right-clicking the Toolbox and selecting "Reset Toolbox".
You should also check if your System.Web.Extensions reference is the correct one. Ensure the version of your System.Web.Extensions reference is 1.0 for projects targeting .NET 2.0 or 3.5 for projects targettng .NET 3.5.
You also might want to take a look at some of the following resources:
Reset toolbox did the trick. I wish I knew what caused the problem, but life is toot short..
Recently I have encountered the same problem.
I've tried to reset toolbox, clear controls from it and then add them again.
But it didn't work for me.
The solution was to simply clean Windows Application Event Log.
I know, this kinda weird, but it worked.
I have repaired, I have uninstalled and re-installed.
I have cleared my event logs.
Can anyone offer any suggestions ?
I'm sorry I cannot suggest a solution right away - we haven't had this one locally. I will try helping with a suggestion though, that could help us identify the reason for the problem:
Can you try creating a fresh Telerik WebSite and drag-and-drop a RadMenu on the Default page?
Do you get the error there?
the Telerik team
Dragging a RadMenu item into the XAML causes the same "The operation could not be completed" error.
Dragging other controls on to the page is no problem.
Manually creating the controls works too.
We just played with the test environments here, trying to reproduce the error, but to no avail. Can you try repairing your Visual Studio installation?
the Telerik team